Not Ranked
Tan,
I would do as suggested and check with the engine builder. I have the 514 and run Kendall GT1 10-40 with a Wix filter. I buy my stuff from Weavers auto supply on Oakland Rd here in San Jose. If they don't have what you want, they will have it within a few hours. The Ford dealer wanted 3 times the price for spark plugs then Weavers charged.
Scott
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